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I want to board out a chunk of the loft, it'll be about 30% of the area at a guess. At the moment there's a fairly thick layer of tradition type loft insulation. Obviously I'm not going to be so daft as to squash is down.
The plan is to remove the insulation and replace it with something like Kingspan, but that seems pretty expensive.
Are there any alternatives?
Screw down lengths of 2x2 along the joists & put the floor down on that.
Then leave the rockwool down.
If the rockwool is still a bit high add another run of 2x2.
Hmm, Didn't think of that approach. Some of the insulation is stupidly high, over a foot in places. I think the Old Lady who had the house before us took advantage of every home insulation scheme/grant/offer going!
Just squash it down. The boards will form an even more effective barrier to trap air within the insulation.
Or you can raise the boards.
[url= http://www.amazon.co.uk/gp/aw/d/B00942ETKC ]Ta-da![/url]
I'm sure I've seen an equivalent product that fixes the boards to the top of the leg. That one might, I just can't see it in that image.
Buy some loft stilts.
Pretty cheap and raise the floor about 12 inches to avoid squashing the insulation.
Depends what you are using loft space for ! If its for storage or working in I'd use kingspan in between roof joists, and probably box it out as a room and insualte the walls. Why because of the very high and low temp ranges you get make it unsuitable for storing anything nice or working in
It'll just be for storage - and for stuff that shouldn't be bothered by temp changes too much. Some bits of furniture, boxes of old toys. Books too, which are all sealed up in big plastic boxes.
Some of the insulation is stupidly high, over a foot in places.
Not really that stupid:
The recommended depth for mineral wool insulation is 270mm but other materials need different depths
[url= http://www.energysavingtrust.org.uk/Insulation/Roof-and-loft-insulation ]http://www.energysavingtrust.org.uk/Insulation/Roof-and-loft-insulation[/url]
Don't replace it. Don't squash it. Just board over the top of it with enough space.